keyBind.awesome.lua

function bindKey(boundKey, boundPressAction, boundReleaseAction, boundTick, boundDelay)
    --default values
    boundPressAction = boundPressAction or function() end
    boundReleaseAction = boundReleaseAction or function() end
    boundTick = boundTick or 100
    boundDelay = boundDelay or 300
    
    --helper functions
    --Note: couldn't use lua os.time os.clock to achieve this so i used io.popen(date... i'm not ashamed :D
    function getSystemTime()
        fh = assert(io.popen("date +%s%N | cut -b1-13"))
        time = fh:read("*l")
        fh:close()
        
        return time
    end
    
    --time calculation vars
    startMark = getSystemTime()
    elapsedMark = 0
    --action flags
    isDelayElapsed = false
    isTicked = false
    
    --stop existing keygrabber
    keygrabber.stop()
    
    keygrabber.run(function(mod, key, event)
        if boundKey == key then
            if event == "press" then
                elapsedMark = getSystemTime() - startMark
                
                if isDelayElapsed then
                    if elapsedMark > boundTick then
                        isTicked = true;
                        startMark = getSystemTime()
                        
                        boundPressAction()
                    end
                else 
                    if elapsedMark > boundDelay then
                        isDelayElapsed = true;
                        startMark = getSystemTime()
                    end
                end
            else
                if not isTicked then
                    boundReleaseAction()
                end
                --stop keygrabber on release
                keygrabber.stop()
            end
        end
    end)
end

--Use like this - all except first parameter are optional
awful.key({ }, "XF86AudioPrev", function () bindKey("XF86AudioPrev", function() awful.util.spawn("mocp -k -2") end, function() awful.util.spawn("mocp --previous") end, 100, 300)  end),
awful.key({ }, "XF86AudioNext", function () bindKey("XF86AudioNext", function() awful.util.spawn("mocp -k +2") end, function() awful.util.spawn("mocp --next") end, 100, 300) end),